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Peng W, Li YH, Yang G, Duan JL, Yang LY, Chen LX, Hou SL, Huang XG. Oral administration of Lactobacillus delbrueckii enhances intestinal immunity through inducing dendritic cell activation in suckling piglets. Food Funct 2022; 13:2570-2580. [PMID: 35166282 DOI: 10.1039/d1fo03864h] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Lactobacillus delbrueckii (LAB) has been demonstrated to exert versatile beneficial effects on modulating intestinal immunity, increasing gut microbial diversity, promoting growth performance, and even preventing disease onset in pigs. However, the underlying mechanism of LAB-mediated gut immunity regulation in piglets remains unclear. In this study, we found that supplementation of LAB significantly increases serum TNF-α, ileum IL-4, and IL-10 levels compared with the control group. Meanwhile, oral supplementation of LAB-modified gut microbial communities was evidenced by the increased abundance of the Lactobacillus genus in the colon. Mechanistically, LAB induced dendritic cell (DC) maturation and activation, which may be relevant to the activation of NF-κB and MAPK signaling pathways. Moreover, we found that oral administration of LAB during the suckling period shows long-lasting immunomodulatory impacts on intestinal immunity after weaning. Collectively, this study uncovers the mechanism of LAB in regulating the intestinal immunity of piglets, suggesting that LAB can be developed as an immunoenhancing biological agent during the suckling period.
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Affiliation(s)
- Wei Peng
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China. .,Engineering Research Center for Feed Safety and Efficient Utilization of Education, Changsha, Hunan 410128, China
| | - Ying-Hui Li
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China. .,Engineering Research Center for Feed Safety and Efficient Utilization of Education, Changsha, Hunan 410128, China
| | - Guan Yang
- Department of Infectious Diseases and Public Health, City University of Hong Kong, Kowloon, Hong Kong SAR, 999077, China
| | - Jie-Lin Duan
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China. .,Engineering Research Center for Feed Safety and Efficient Utilization of Education, Changsha, Hunan 410128, China
| | - Ling-Yuan Yang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China. .,Engineering Research Center for Feed Safety and Efficient Utilization of Education, Changsha, Hunan 410128, China
| | - Li-Xiang Chen
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China. .,Engineering Research Center for Feed Safety and Efficient Utilization of Education, Changsha, Hunan 410128, China
| | - Shu-Ling Hou
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China. .,Engineering Research Center for Feed Safety and Efficient Utilization of Education, Changsha, Hunan 410128, China
| | - Xing-Guo Huang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China. .,Engineering Research Center for Feed Safety and Efficient Utilization of Education, Changsha, Hunan 410128, China
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